Mitsubishi Electric FR-D720-0.2K-G Instruction Manual page 132

Pr. 152
Pr. 152
0[A]
OFF ON
Start signal
Zero current
OFF
detection time
(Y13)
Pr. 153
Detection time
* The Zero current detection (Y13) signal holds the
signal for approximately 0.1s once turned ON.
REMARKS
 The response time of Y12 and Y13 signals is approximately 0.1s. Note that the response time changes according to the load
condition.
 When Pr. 152 = "0", detection is disabled.
NOTE
 Changing the terminal assignment using Pr. 190, Pr. 192 (output terminal function selection) may affect the other functions.
Set parameters after confirming the function of each terminal.
The zero current detection level setting should not be too low, and the zero current detection time setting not
too long. Otherwise, the detection signal may not be output when torque is not generated at a low output
current.
To prevent the machine and equipment from resulting in hazardous conditions detection signal, install a
safety backup such as an emergency brake even the zero current detection function is set valid.
Parameters referred to
Pr. 190, Pr. 192 (output terminal function selection)
Function assignment of external terminal and control
(2)
If the output during drive unit running is the Pr. 152 setting or
When the drive unit's output current falls to "0", torque will
0.1s* Time
OFF
ON ON
For the Y13 signal, set "13 (positive logic) or 113 (negative
Pr. 153
Detection time
CAUTION
Refer to page 123.
Zero current detection (Y13 signal, Pr. 152, Pr. 153)
lower for the time set in Pr. 153 or longer, the Zero current
detection (Y13) signal is output from the drive unit's open
collector or relay output terminal.
not be generated. This may cause a drop due to gravity
when the drive unit is used in vertical lift application.
To prevent this, the Y13 signal can be output from the drive
unit to close the mechanical brake when the output current
has fallen to "zero".
logic)" in Pr. 190 or Pr. 192 (output terminal function selection)
and assign functions to the output terminal.
4
129